A lithium complex of a bis(amido)bis(imido)-silicate dianion

The title compound, bis[mu(3)-bis(tert-butylamido)bis(tert-butylimido) silyl]di-mu(3)-chloro-tetratetrahydrofuranhexalithium( I), [Li-6(C16H38N4Si)(2)Cl-2(C4H8O)(4)], crystallizes as a dimer of two contact ion pairs linked together by two molecules of lithium chloride. The two halves of the molecule are related by a crystallographic twofold rotation axis